Explain how forests prevent floods

NCERT Solutions Class 7 Science Chapter 12 Forests: Our Lifeline is provided here to help students in understanding the topic thoroughly. All these solutions are solved by experts with a detailed explanation. Class 7 NCERT Solutions for Science Chapter 12 includes all the textbook exercise questions and answers. These solutions will help students complete their assignments & homework. Class 7 Science Forests: Our Lifeline Questions and Answers Exercise Questions Question 1: Explain how animals dwelling in the forest help it grow and regenerate. Answer: Animals dwelling in the forest help it grow and regenerate in the following ways • Animals help in dispersing plant seeds. • Decaying animal dung provides nutrients for plants to grow • Microorganisms convert the dead plants and animals to humus Question 2: Explain how forests prevent floods. Answer: Forest acts as a natural absorber of water. It allows rain water to seep through. In the absence of trees, the rain water would hit the ground directly resulting in flood. However, because of the presence of trees, rain water does not hit the ground directly. It rather hits the ground slowly. Hence, before flooding, all the rain water seeps through ground. In this way, forests prevent floods. Question 3: What are decomposers? Name any two of them. What do they do in the forest? Answer 3: Decomposers are the organisms which feed on the dead bodies of plants and animals. Examples: Fungi and Bacteria. They clean the forests decayin...

Pennsylvania contains almost 83,000 miles of rivers and streams, ranging from small trickles to large rivers. These waterways are important because they provide water for people, farms, and industries; provide habitat for many kinds of wildlife and fish; and also provide us with great places to fish, swim, and boat. As our landscape changes, it begins to have an impact on stream health. What we do on or to the land affects both the quantity (volume) and quality (pollutant levels) of the water in our streams and lakes. The land area through which any water moves, or drains, to reach a stream is called a watershed. As we begin to remove forest canopy and replace it with roads, parking lots, driveways, homes, patios, pools (impervious surfaces) and even grass, we immediately have impact on watersheds and receiving streams (or lakes). With the increased amount of impervious surfaces, water runs off the land, traveling on the surface towards the streams. As this 'storm water runoff' travels to the streams it collects pollutants and increases speed. The changes to the landscape, not only increase the volume of water that goes to the stream, it also shortens the amount of time it takes the water to get to the stream. These increased or peak flows cause water to move quickly to the streams. This leads to flooding, stream bank erosion, widening of streams, sediment deposited in streams, a loss of fish habitat, and decline in water quality. In Pennsylvania there are over 12,200 mile...

One third of European territory is covered by forests (mostly managed) and approximately 296 million Europeans live in or close to forests. Forests are essential for human well-being and provide a wide range of ecosystem services to society, including ‘water retention’, defined as the water absorbed or used by forests. The EEA report The volume of water retained by forests can depend on characteristics such as forest cover area, the length of vegetation growing season, tree composition and tree density, as well as the age and the number of layers of vegetation cover. Water retention by forests affects the amount and timing of the water delivered to streams and groundwater by increasing and maintaining infiltration and storage capacity of the soil. Forests can soak up excess rainwater, preventing run-offs and damage from flooding. By releasing water in the dry season, forests can also help provide clean water and mitigate the effects of droughts. The report shows that water retention potential tends to increase along with the extent of forest cover in a water basin. Compared to basins with a forest cover of 10%, total water retention is 25% and 50% higher in water basins where the forest cover is more than 30% and 70%, respectively. Irrespective of the extent of the basin’s forest cover, water retention is typically about 25% greater in summer time than in winter time and that coniferous forests in general retain 10% more water than broadleaved forests or mixed forests. In ...

• NCERT Solutions Menu Toggle • NCERT Solutions for Class 12 • NCERT Solutions for Class 11 • NCERT Solutions for Class 10 • NCERT Solutions for Class 9 • NCERT Solutions for Class 8 • NCERT Solutions for Class 7 • NCERT Solutions for Class 6 • NCERT Books • TS Grewal Solutions • MCQ Questions Menu Toggle • NCERT MCQ These Forests: Our Lifeline NCERT Solutions for Class 7 Science Chapter 17 Class 7 Science Chapter 17 Forests: Our Lifeline Textbook Exercise Questions and Answers Question 1. Explain how animals dwelling in the forest help it grow and regenerate. Answer: Animals which live in the forest help it grow and regenerate in following ways: • By eating vegetation, they clear the land for fresh growth. • Animals help flowering plants in pollination and seed dispersal. • Dead remains of animals make humus after decomposition. This increases soil fertility. Question 2. Explain how forests prevent floods. Answer: Forest acts as a natural absorber of rainwater and allows it to seep underground. It helps in controlling the flow of water and slows it down which helps in preventing floods. Also, the trees present in the forest prevents the rain from directly hitting the ground and bind the soil together which helps in absorption of the rainwater and thus prevent flood. Question 3. What are decomposers? Name any two of them. What do they do in the forest? Answer: The organisms which decompose the dead remains of plants and animals are called decomposers. Fungi and bacteria ar...

One third of European territory is covered by forests (mostly managed) and approximately 296 million Europeans live in or close to forests. Forests are essential for human well-being and provide a wide range of ecosystem services to society, including ‘water retention’, defined as the water absorbed or used by forests. The EEA report The volume of water retained by forests can depend on characteristics such as forest cover area, the length of vegetation growing season, tree composition and tree density, as well as the age and the number of layers of vegetation cover. Water retention by forests affects the amount and timing of the water delivered to streams and groundwater by increasing and maintaining infiltration and storage capacity of the soil. Forests can soak up excess rainwater, preventing run-offs and damage from flooding. By releasing water in the dry season, forests can also help provide clean water and mitigate the effects of droughts. The report shows that water retention potential tends to increase along with the extent of forest cover in a water basin. Compared to basins with a forest cover of 10%, total water retention is 25% and 50% higher in water basins where the forest cover is more than 30% and 70%, respectively. Irrespective of the extent of the basin’s forest cover, water retention is typically about 25% greater in summer time than in winter time and that coniferous forests in general retain 10% more water than broadleaved forests or mixed forests. In ...

NCERT Solutions Class 7 Science Chapter 12 Forests: Our Lifeline is provided here to help students in understanding the topic thoroughly. All these solutions are solved by experts with a detailed explanation. Class 7 NCERT Solutions for Science Chapter 12 includes all the textbook exercise questions and answers. These solutions will help students complete their assignments & homework. Class 7 Science Forests: Our Lifeline Questions and Answers Exercise Questions Question 1: Explain how animals dwelling in the forest help it grow and regenerate. Answer: Animals dwelling in the forest help it grow and regenerate in the following ways • Animals help in dispersing plant seeds. • Decaying animal dung provides nutrients for plants to grow • Microorganisms convert the dead plants and animals to humus Question 2: Explain how forests prevent floods. Answer: Forest acts as a natural absorber of water. It allows rain water to seep through. In the absence of trees, the rain water would hit the ground directly resulting in flood. However, because of the presence of trees, rain water does not hit the ground directly. It rather hits the ground slowly. Hence, before flooding, all the rain water seeps through ground. In this way, forests prevent floods. Question 3: What are decomposers? Name any two of them. What do they do in the forest? Answer 3: Decomposers are the organisms which feed on the dead bodies of plants and animals. Examples: Fungi and Bacteria. They clean the forests decayin...

• NCERT Solutions Menu Toggle • NCERT Solutions for Class 12 • NCERT Solutions for Class 11 • NCERT Solutions for Class 10 • NCERT Solutions for Class 9 • NCERT Solutions for Class 8 • NCERT Solutions for Class 7 • NCERT Solutions for Class 6 • NCERT Books • TS Grewal Solutions • MCQ Questions Menu Toggle • NCERT MCQ These Forests: Our Lifeline NCERT Solutions for Class 7 Science Chapter 17 Class 7 Science Chapter 17 Forests: Our Lifeline Textbook Exercise Questions and Answers Question 1. Explain how animals dwelling in the forest help it grow and regenerate. Answer: Animals which live in the forest help it grow and regenerate in following ways: • By eating vegetation, they clear the land for fresh growth. • Animals help flowering plants in pollination and seed dispersal. • Dead remains of animals make humus after decomposition. This increases soil fertility. Question 2. Explain how forests prevent floods. Answer: Forest acts as a natural absorber of rainwater and allows it to seep underground. It helps in controlling the flow of water and slows it down which helps in preventing floods. Also, the trees present in the forest prevents the rain from directly hitting the ground and bind the soil together which helps in absorption of the rainwater and thus prevent flood. Question 3. What are decomposers? Name any two of them. What do they do in the forest? Answer: The organisms which decompose the dead remains of plants and animals are called decomposers. Fungi and bacteria ar...

Pennsylvania contains almost 83,000 miles of rivers and streams, ranging from small trickles to large rivers. These waterways are important because they provide water for people, farms, and industries; provide habitat for many kinds of wildlife and fish; and also provide us with great places to fish, swim, and boat. As our landscape changes, it begins to have an impact on stream health. What we do on or to the land affects both the quantity (volume) and quality (pollutant levels) of the water in our streams and lakes. The land area through which any water moves, or drains, to reach a stream is called a watershed. As we begin to remove forest canopy and replace it with roads, parking lots, driveways, homes, patios, pools (impervious surfaces) and even grass, we immediately have impact on watersheds and receiving streams (or lakes). With the increased amount of impervious surfaces, water runs off the land, traveling on the surface towards the streams. As this 'storm water runoff' travels to the streams it collects pollutants and increases speed. The changes to the landscape, not only increase the volume of water that goes to the stream, it also shortens the amount of time it takes the water to get to the stream. These increased or peak flows cause water to move quickly to the streams. This leads to flooding, stream bank erosion, widening of streams, sediment deposited in streams, a loss of fish habitat, and decline in water quality. In Pennsylvania there are over 12,200 mile...

Pennsylvania contains almost 83,000 miles of rivers and streams, ranging from small trickles to large rivers. These waterways are important because they provide water for people, farms, and industries; provide habitat for many kinds of wildlife and fish; and also provide us with great places to fish, swim, and boat. As our landscape changes, it begins to have an impact on stream health. What we do on or to the land affects both the quantity (volume) and quality (pollutant levels) of the water in our streams and lakes. The land area through which any water moves, or drains, to reach a stream is called a watershed. As we begin to remove forest canopy and replace it with roads, parking lots, driveways, homes, patios, pools (impervious surfaces) and even grass, we immediately have impact on watersheds and receiving streams (or lakes). With the increased amount of impervious surfaces, water runs off the land, traveling on the surface towards the streams. As this 'storm water runoff' travels to the streams it collects pollutants and increases speed. The changes to the landscape, not only increase the volume of water that goes to the stream, it also shortens the amount of time it takes the water to get to the stream. These increased or peak flows cause water to move quickly to the streams. This leads to flooding, stream bank erosion, widening of streams, sediment deposited in streams, a loss of fish habitat, and decline in water quality. In Pennsylvania there are over 12,200 mile...

NCERT Solutions Class 7 Science Chapter 12 Forests: Our Lifeline is provided here to help students in understanding the topic thoroughly. All these solutions are solved by experts with a detailed explanation. Class 7 NCERT Solutions for Science Chapter 12 includes all the textbook exercise questions and answers. These solutions will help students complete their assignments & homework. Class 7 Science Forests: Our Lifeline Questions and Answers Exercise Questions Question 1: Explain how animals dwelling in the forest help it grow and regenerate. Answer: Animals dwelling in the forest help it grow and regenerate in the following ways • Animals help in dispersing plant seeds. • Decaying animal dung provides nutrients for plants to grow • Microorganisms convert the dead plants and animals to humus Question 2: Explain how forests prevent floods. Answer: Forest acts as a natural absorber of water. It allows rain water to seep through. In the absence of trees, the rain water would hit the ground directly resulting in flood. However, because of the presence of trees, rain water does not hit the ground directly. It rather hits the ground slowly. Hence, before flooding, all the rain water seeps through ground. In this way, forests prevent floods. Question 3: What are decomposers? Name any two of them. What do they do in the forest? Answer 3: Decomposers are the organisms which feed on the dead bodies of plants and animals. Examples: Fungi and Bacteria. They clean the forests decayin...